关键词: 西藏, 格林错断层带, 分段活动, 发震断层

Abstract: Gyaring Co fault zone across Xainza and central Tibet had been formed before late Cretaceous period,and has been reactivated with right lateral motion since Quaternary.The fault zone consists of four subparallel faults in an arrangement of right stepping en echelon,and three pull-apart basins,occupied by Zigui Co,Gyaring Co and Waang Co respectively,are formed in righ-step like.Gyaring Co fault zone is one of main seis-mogenic fault in central Tibetean plateau.At least four surface ruptures associated with earthquake have occurred clearly along the fault zone since Holocene,with the segmentation of activity along the fault zone.

Key words: Tibet, Gyaring Co fault, Segmentation of activity, Seismogenic fault